Snap fastener



H. J.\ REITER SNAPy FASTENER March 18, 1941.

Filed Feb. '7, 1940 Patented Mar. 18, 1.941

UNITED STATES PATENT OFFICE SNAP FASTENER Harold J. Reiter, Chicago, lll. Application February 7, 1940, serial No. 317,651

4 Claims.

The invention relates to improvements in snap fasteners and more particularly to an attaching member of the type having piercing tangs arranged to be passed through the material, to which the fastener element is to be attached, and engaged in a circumferential groove on an associated part.

An object of the invention is to provide a snap fastener element with an attaching member embodying reinforced means to insure a firm anchorage to an associated part.

Another object is to provide an attaching member with reinforced tangs to facilitate their piercing the material on lwhich the fastener is mounted, without becoming distorted.

Another object is to provide a snap fastener element with means to render it less likely to become separated from its mounting or otherwise damaged while in use.

The foregoing and such other objects of the invention as will` more fully appear hereinafter as the description proceeds will be more readily understood from a perusal of the following specication in which reference is had to the accompanying drawing, wherein:

Fig. 1 is an enlarged central sectional view of a snap fastener element.

Fig. 2 is a plane view of the attaching member.

Fig. 3 is an enlarged fragmentary central sectional view of the attaching member.

Referring to the structure illustrated the snap fastener element there shown consists of a female part II and an attaching member or part I2. As best shown in Fig. 1, the part I I is formed integral preferably from a thin circular sheet of metal. A substantially cylindrical socket I3 is formed by striking or drawing the metal of the body I4 downwardly. Said socket preferably is enlarged at its lower end to provide an annular recess to receive a split ring I5 having a diameter slightly less than the diameter of a male part (not Shown) to aord detachable interlocking engagement of the two parts.

In assembly, the female part Il is positioned on one face of the sheet of material I6 to which it is to be attached and'the attaching member I2 is positioned on the opposite face with its triangular piercing tangs I'l disposed toward the material. Pressure then is applied (preferably by a power p ress) to force the tangs I1 through the material and into contact with the bottom face of the body I4. Continued pressure causes the ends of the tangs to curl outwardly radially until they engage in an internal circumferential groove or channel I8 formed on the bottom face of the female part II by an annular bead I9. This engagement securely locks the two parts together on the material.

To prevent unwarranted distortion of the tangs 5 l1 while pressing them through the material, particularly when material such as leather or the like is used, each of said tangs preferably is provided with a longitudinal groove or channel 2|, which, as best shown in Fig. 3, extend from the 10 basesof the tangs substantially to their apexes. This groove materially strengthens the tang, due primarily to the displacement of the metal in the forming of the groove. When the tangs have passed through the material and are curled outwardly into the annular channel I8 of the female part Il, said tangs resist any tendency to straighten or pull out at any time while in use.

Obviously, fastener parts constructed differently from the one shown by way of illustration may be securely attached by an associated attaching member of the character constituting the essence of this invention, provided, of course, that Isuit-v able means is` provided to receive the tangs I'I.

I claim: 2D

1. An attaching member for a snap fastener element comprising, a at annulus, a plurality of flat triangular shaped piercing tangs disposed at right angles to said annulus, said tangs being integral with the inner circumferential edge of said annulus, and a groove on the inwardly disposed face of each of said tangs, said grooves being substantially V-shaped in section and extending substantially from the apex of said tangs to their bases without distorting the fiat outwardly disposed faces of said tangs.

2. An attaching member for a snap fastener element comprising a flat annulus, a plurality of fiat triangular shaped piercing tangs extending at right angles to said annulus, said tangs being integral with the inner circumferential edge of said annulus, and a shallow groove on` the inwardly disposed face of each of said tangs, said grooves extending substantially from the apex of said tangs to their bases without distorting the apex of said tangs to their bases without distorting the flat outwardly disposed faces of said tangs.

4. An attaching member for a snap fastener element comprising a circular sheet of material, a plurality of at triangular shaped piercing tangs integral with and extending at right angles to the plane o1' said sheet, and a groove on the inwardlii disposed face of each of said tangs, said grooves being substantially V-shaped in section and extending substantially from the apex of said tangs to their bases without distorting the flat outwardly disposed faces of said tangs.

HAROLD J. REITER. 

